function Hiden() {
  var shadow = document.getElementById("shadow");
  var task = document.getElementById("task");
  shadow.style.display = "none";
  task.style.display = "none";
}
function Show() {
  var shadow = document.getElementById("shadow");
  var task = document.getElementById("task");
  shadow.style.display = "block";
  task.style.display = "block";
}
